io/inout.h

/*
* Copyright (c) by BlackMark 2015-2016
* Date 25/02/2016
* Version 2.4
*/

#ifndef INOUT_H
#define INOUT_H

#include <stdint.h>
#include <avr/io.h>

#define AVR_DIP40 defined (__AVR_ATmega32A__) || defined (__AVR_ATmega644P__) || defined (__AVR_ATmega1284P__)
#define AVR_DIP28 defined (__AVR_ATmega8__) || defined (__AVR_ATmega168A__) || defined (__AVR_ATmega328P__)
#define AVR_DIP8 defined (__AVR_ATtiny13A__)

#if AVR_DIP40
	#define PORT_PINA &PINA
	#define PORT_DDRA &DDRA
	#define PORT_PORTA &PORTA
#else
	#define PORT_PINA nullptr
	#define PORT_DDRA nullptr
	#define PORT_PORTA nullptr
#endif

#if AVR_DIP40 || AVR_DIP28 || AVR_DIP8
	#define PORT_PINB &PINB
	#define PORT_DDRB &DDRB
	#define PORT_PORTB &PORTB
#else
	#define PORT_PINB nullptr
	#define PORT_DDRB nullptr
	#define PORT_PORTB nullptr
#endif

#if AVR_DIP40 || AVR_DIP28
	#define PORT_PINC &PINC
	#define PORT_DDRC &DDRC
	#define PORT_PORTC &PORTC
#else
	#define PORT_PINC nullptr
	#define PORT_DDRC nullptr
	#define PORT_PORTC nullptr
#endif

#if AVR_DIP40 || AVR_DIP28
	#define PORT_PIND &PIND
	#define PORT_DDRD &DDRD
	#define PORT_PORTD &PORTD
#else
	#define PORT_PIND nullptr
	#define PORT_DDRD nullptr
	#define PORT_PORTD nullptr
#endif

class InOut
{
public:
	enum class Pin
	{
		P_NONE = -1,
#if AVR_DIP40
		P_A0 = 0x00,
		P_A1 = 0x01,
		P_A2 = 0x02,
		P_A3 = 0x03,
		P_A4 = 0x04,
		P_A5 = 0x05,
		P_A6 = 0x06,
		P_A7 = 0x07,
#endif
#if AVR_DIP40 || AVR_DIP28 || AVR_DIP8
		P_B0 = 0x10,
		P_B1 = 0x11,
		P_B2 = 0x12,
		P_B3 = 0x13,
		P_B4 = 0x14,
		P_B5 = 0x15,
#endif
#if AVR_DIP40 || AVR_DIP28
		P_B6 = 0x16,
		P_B7 = 0x17,
		P_C0 = 0x20,
		P_C1 = 0x21,
		P_C2 = 0x22,
		P_C3 = 0x23,
		P_C4 = 0x24,
		P_C5 = 0x25,
		P_C6 = 0x26,
#endif
#if AVR_DIP40
		P_C7 = 0x27,
#endif
#if AVR_DIP40 || AVR_DIP28
		P_D0 = 0x30,
		P_D1 = 0x31,
		P_D2 = 0x32,
		P_D3 = 0x33,
		P_D4 = 0x34,
		P_D5 = 0x35,
		P_D6 = 0x36,
		P_D7 = 0x37,
#endif
	};

	enum class Dir
	{
		D_IN = 0,
		D_OUT = 1
	};

	enum class Type
	{
		T_PIN = 0,
		T_DDR = 1,
		T_PORT = 2
	};

	static volatile uint8_t* getPort( Pin enmPin, Type enmType );
	static uint8_t getPin( Pin enmPin );

	static void setPinDirection( Pin enmPin, Dir enmDir, bool bPullup );
	static bool readPin( Pin enmPin );
	static void writePin( Pin enmPin, bool bValue );

	static uint8_t readPort( Pin enmPortPin );
	static void writePort( Pin enmPortPin, uint8_t ui8Value );

	//////////////////////////////////////////////////////////////////////////
	static inline void setPinDirection( volatile uint8_t *vpui8Port, uint8_t ui8Pin, Dir enmDir )
	{
		if( enmDir == Dir::D_OUT )
		{
			*vpui8Port |= ( 1 << ui8Pin );
		}
		else
		{
			*vpui8Port &= ~( 1 << ui8Pin );
		}
	}

	//////////////////////////////////////////////////////////////////////////
	static inline bool readPin( volatile uint8_t *vpui8Port, uint8_t ui8Pin )
	{
		if( ( ( *vpui8Port ) >> ui8Pin ) & 1 )
		{
			return true;
		}

		return false;
	}

	//////////////////////////////////////////////////////////////////////////
	static inline void writePin( volatile uint8_t *vpui8Port, uint8_t ui8Pin, bool bValue )
	{
		if( bValue )
		{
			*vpui8Port |= ( 1 << ui8Pin );
		}
		else
		{
			*vpui8Port &= ~( 1 << ui8Pin );
		}
	}

	//////////////////////////////////////////////////////////////////////////
	static inline void setPortDirection( volatile uint8_t *vpui8Port, Dir enmDir )
	{
		*vpui8Port = ( ( enmDir == InOut::Dir::D_OUT ) ? ( 0xFF ) : ( 0x00 ) );
	}

	//////////////////////////////////////////////////////////////////////////
	static inline uint8_t readPort( volatile uint8_t *vpui8Port )
	{
		return *vpui8Port;
	}

	//////////////////////////////////////////////////////////////////////////
	static inline void writePort( volatile uint8_t *vpui8Port, uint8_t ui8Value )
	{
		*vpui8Port = ui8Value;
	}
};

//////////////////////////////////////////////////////////////////////////

class InOutPin
{
private:
	volatile uint8_t *m_vpui8Input;
	volatile uint8_t *m_vpui8Dir;
	volatile uint8_t *m_vpui8Output;

	uint8_t m_ui8Pin;

public:
	InOutPin();
	InOutPin( InOut::Pin enmPin );
	~InOutPin();

	void setPin( InOut::Pin enmPin );

	//////////////////////////////////////////////////////////////////////////
	inline void setDirection( InOut::Dir enmDir, bool bPullup )
	{
		if( !m_vpui8Dir || !m_vpui8Output )
		{
			return;
		}

		InOut::setPinDirection( m_vpui8Dir, m_ui8Pin, enmDir );

		if( enmDir == InOut::Dir::D_IN )
		{
			InOut::writePin( m_vpui8Output, m_ui8Pin, bPullup );
		}
	}

	//////////////////////////////////////////////////////////////////////////
	inline bool read()
	{
		if( !m_vpui8Input )
		{
			return false;
		}

		return InOut::readPin( m_vpui8Input, m_ui8Pin );
	}

	//////////////////////////////////////////////////////////////////////////
	inline void write( bool bValue )
	{
		if( !m_vpui8Output )
		{
			return;
		}

		InOut::writePin( m_vpui8Output, m_ui8Pin, bValue );
	}
};

//////////////////////////////////////////////////////////////////////////

class InOutPort
{
private:
	volatile uint8_t *m_vpui8Input;
	volatile uint8_t *m_vpui8Dir;
	volatile uint8_t *m_vpui8Output;

public:
	InOutPort();
	InOutPort( InOut::Pin enmPortPin );
	~InOutPort();

	void setPort( InOut::Pin enmPortPin );

	//////////////////////////////////////////////////////////////////////////
	inline void setDirection( InOut::Dir enmDir, bool bPullup )
	{
		if( !m_vpui8Dir || !m_vpui8Output )
		{
			return;
		}

		InOut::setPortDirection( m_vpui8Dir, enmDir );

		if( enmDir == InOut::Dir::D_IN )
		{
			InOut::writePort( m_vpui8Output, ( ( bPullup ) ? ( 0xFF ) : ( 0x00 ) ) );
		}
	}

	//////////////////////////////////////////////////////////////////////////
	inline uint8_t read()
	{
		if( !m_vpui8Input )
		{
			return 0;
		}

		return InOut::readPort( m_vpui8Input );
	}

	//////////////////////////////////////////////////////////////////////////
	inline void write( uint8_t ui8Value )
	{
		if( !m_vpui8Output )
		{
			return;
		}

		InOut::writePort( m_vpui8Output, ui8Value );
	}
};

#endif